Emotion is a feeling. Change is an action. So changes for those kids and their parents - no. Maybe a prayer is all you can do. Change in how you appreciate your own loved ones - maybe. There are parents of children who survived that appreciate what they have more acutely now.
Seems like they concluded it was a shotgun in the car. http://www.nytimes.com/2012/12/17/u...le-rifle-in-newtown.html?pagewanted=all&_r=1& http://en.wikipedia.org/wiki/Sandy_Hook_Elementary_School_shooting#Weapons Authorities recovered a large quantity of unused ammunition at the school[52] along with three semi-automatic firearms next to Adam Lanza: a .223 caliber Bushmaster XM-15 rifle,[53] a 10mm Glock handgun,[4] and a 9mm SIG Sauer handgun.[3][54][55][56] A shotgun was found in the car Lanza drove to the school.[4] At home, Lanza "had access"[56] to three more firearms: a .45 Henry repeating rifle, a .30 Enfield rifle, and a .22 Marlin rifle. On December 16, police say Lanza used the rifle against most of the victims.[59] According to the medical examiner, all victims were shot with the same "long weapon" and were hit multiple times. Lanza shot all victims multiple times, and he shot at least one victim 11 times. The gunman's mother was found dead in her pajamas in bed, shot four times in the head with a .22-caliber rifle.